We may have found other answers which could help you.
Click here for Ferroli Modena 102Hi how to increase the water pressure on ferroli optimax 25C?
Parts for ferroli optimax he 31c ?
Replace a diverter valve?
i have a ferroli combi boiler i have 1/2 the radiators working and 1/2 not ?
How can i repair a noCN fault on my boiler?
Ferroli Optimax HE31c a26 problem?